Electrical connection



7 Dec. 5 1944. N BOLLES 2,364,124

ELECTRICAL CONNECTION Filed Feb. 24, 1942 Patented Dec. 5, 1944 1 f UNITED. STATES PATFENT'V'VIOFF'ICE l ELECTRICAL oo NEcTioiv Myrick N. Bolle s, Brookings', S. Dak. 1 Application February 24, 1942, Serial No. 432,131

2 Claims. ('o1. 173,-259) This invention relates to an electrical connection and it is primarily anobject of the invention to provide a connection which can be easily and quickly attached and with the same facility disconnected. 1 1 I It is also an object of the invention to provide aconnection of this kind of a character ,whichcan be easily attached or disconnected under severe weather conditions as during rain, snow, extreme cold or great heat.

A still further objectpf the invention is to provide an electrical connection which is free of bolts, nuts or other mechanical devices and which is also of 1a characterto be unhampered by rust, oxides or other conditions which may be created by heat, cold or alcidiccorrosion.

A stillfurtherobject of the invention is to 5m ,vide a, connection of th s kind wherein, is employeda low'melting alloy which serves toprovide aneffective adhesion for maintaining the connection.

, .The invention also contemplates for anob-ject Figure 6 is a view in top plan of the top or cap plate illustrated in Figures 2 and 3, and' Figure 7 is a view in plan of the top or cap plate as illustrated in Figures 4 and 5. I As disclosed in the accompanying drawing, B denotes a conventional type of battery including the usual positive post I and negative post; 2. While the present embodiment of the inventionis being described and illustrated as being used in connection with a battery, it is to be understood that I am not limiting, myself to such particular use asthe invention can be employed with equal 1 facility in connection withelectrical connections 1 of othertypes.

Superimposed upon thegtop face of thenega Q tive post 2 is a plate 3 of; copper buthaving disto provide an electrical connection which elim f inates the use of any mechan cal devices and wherein the connection can be attached or disconnected with convenience and facility by the 1 use of heat of a comparatively low temperature.

[The invention also has for an object to provide a connection of thiskind which may be employed asafusetobreak theconnection upon abnormal electrical load.

The'inven'tion consists in the details of construction and in the combination and arrangement of the several parts of my electrical connection whereby certain important advantages are attained, as Wi11 'be hereinafter more fully set forth.

posed thereover a lamination 4 of lead. This lamination 4 may be of any thickness preferred al, though, of course, it must be sufficient to eifec- 1 tively protect the applied plate ,3 against acidic corrosion or other actions which-would have a trated in Figure 2' of the drawing, the base of this slot is disposed on a predetermined are from applied position upon its post 2 by the applica- 1 1 tion of proper heatas, of course, asis well known,

the post 2 is, also of lead, although, of course,

this plate 3 may be held in effective applied posi- In order that my invention may be better un- 1 derstood, I will now proceed to describe the same with reference to the accompanying drawing, wherein: 1

Figure 1 is a view in top plan of a battery showing electrical connections employed in con nection therewith and arranged in accordance with an embodiment of my invention.

Figure 2 is an enlarged fragmentary detailed sectional View taken substantially on the line 2-2 of Figure 1; d

Figure 3 is a detailed sectional view taken substantially on the line 33 of Figure 2.

Figure 4 is a detailed sectional view taken substantially on the line 44 of Figure 1.

Figure 5 is a sectional View taken substantially on the line 55 of Figure 4.

tion in any manner deemed expedient.

The plate 3 constitutes ,one element of the electrical connection and in'the present embodiment of my invention, the secondfelement of the connection comprises an elongated bar or strip I, preferably of copper, having one end portion Offset, as at 8, to provide a foot 9 to be brazed or otherwise attached to a head or guide member ID of material conductive of electrici and which is securely mounted upon and in electrical connection with an electrical conductor cable II.

As illustrated in the accompanying drawing, the head or guide member I 0 isof a split type and is so formed'asto be readily applied upon the extended end portion of the post 2, thereby facilitating the initial operation in attaching the connection. While the use of this head or guide memher ID has been found of advantage when the connection is employed with respect to a post of a battery, it is to be understood that I do not wish to limit myself to the use of such a head or member in instances as it is possible to H use my improved connection without such head or member.

The major or free portion of the bar or strip 1 is formed to provide a depending blade l2 which is substantially snugly received within the slot 6. However, there is suflicient space between the applied blade I2 and the walls of the slot 6 to allow eiiective spreading, under proper heat, of a soft metal alloy a, such as Newton's :metaL-so .as to spread over substantially the entire surfaces of the blade l2 and walls of the slot 6 to create effective adhesion between the applied blade IZ and the Walls of the slot 6 to assure the connection being maintained attached under normal conditions.

It is to be stated that in applying the connection, the blade l2 and the portion of the post 2 provided with the slot 6 is heated to a deg-ree sufficient to assure the desired melting of the alloy. It is also to be stated that the "bar Iv together with its blade 12 is coated with a lead film -to' protect the same against acidic corro- 'sion orsthe like.

As illustrated in Figures 1 and "2, this strip or bar 1 is substantially straight from end to end. In the present embodiment of the invention, this is shown in order to readily identify the post 2 comprised in the connection as "being the negative post.

(interposed between the head or member Hi and the :strip or bar F! at a point closely adjacent to the offset tpiortion B 'is an expansible member 1 4, herein disclosed. as a 'coil spring. This member 14 is of such tension @to throw the blade i2 into open position 'uponabnormal load on the circuit. This abnormal load will result in substantially an instantaneous melting of the adhesive alloy.

When it is desired to break OIidiSCOIlIlGCt :the connection, it is only necessary that suitable heat be applied thereto to melt the fusing alloy. This is of particular importance as it enables a desired disconnection-to be made irrespective of atmospheric conditions as this operation can be accomplished in extreme cold, great heat, in rain :or in snow. It :is also to be pointed out "that the connection is 'one'which is entirely .free

or other element in the same manner as hereinbefore set forth in connection with the strip or bar land the outer or free portion of the strip or bar l1 carries the oppositely directedfand perpendicularly related arms 19, so that the strip or bar '1'! together with the bars l9 will be effectively received in the cross grooves iii of the plate 15. Aside from this difference in design, the connection as herein disclosed for use with a positive post operates in the same manner as 'hereinbefore described in connection with the negative post 2.

result of overload of current.

From the foregoing description it is thought to be obvious that an electrical connection constructed in accordance with my invention is particularl well adapted for use by reason of the convenience and facility with which it may be assembled and operated.

I claim:

1. A terminal for adhesively holding a contact blade comprising a member conductive .of electricity and having aface provided with a slot, a plate overlying such face and in close contact therewith, said plate having a rib depending therefrom to engagewithin the slot ofthe member, said plate also having a slot extending into the rib to receive the blade, and fusible means within the second slot for adhesively holding the blade within the slot of the plate.

2. A terminal connection including a member conductive of electricity and having a face provided with a slot, a plate overlying said face and in close contact therewith, said plate having a depending rib pressed therefrom to provide. an outwardly facing slot to receive a second part of the connection, and fusible means within said second slot for adhesively holding such second part within the slot of the plate.

MYRICK N. BOLLES. 

